Tool holder



Dec. 5, 1939. B. F. Rosx-:NBERG E1- AL 2,182,411

TOOL HOLDER Filed June l1, 1938 I f Y INVENTOR. eaggmzaifzQ/Zfaberzery lBY am? .6

Qg- QZMATTORNEY.

Patented Dec. 5, 1939 UNITED STATES PATENT OFFICE TOOL HOLDER ApplicationlJune 11, 1938, Serial No. 213,176

5 Claims.

In connection with many machinery operations, it is necessary or desirable to adjust the tool with respect to the work-piece being acted upon. This is particularly true of drilling operations and in addition to the first setting of the drill in the holder it becomes necessary to adjust the drill after it has been sharpened or broken or for other reasons. y

The present invention relates to an improved holder for tools and for convenience in description will be described particularly in connection with drills although of course it may be used for reamers, milling tools, or other similar tools.

The objects of the invention are to provide an improved tool holder having means for readily adjusting the position of the tool with respect to the holder; to provide a drill holder having a micrometer adjustment for adjusting the drill with respect to 'the holder; to provide a drill holder having means for adjusting the position of the drill and having positive driving means as well as holding means for centering and holding the drill; and to provide such other advantages and novel features as will be described more fully hereinafter.

In the accompanying drawing illustrating this invention;

Figure 1 is a side view;

Figure 2 is an end View;

Figure 3 is a longitudinal sectional view showing the holder with the drill held in driving position;

Figure 4 is a similar view showing the parts in position for adjusting;

Figure 5 is a cross sectional view taken on the line 5 5 of Figure 3;

Figure 6 is a cross sectional View taken on the line 6-6 of Figure 3;

Figure 7 is a sectional view taken on the line 'I-l of Figure 3; and y Figure 8 is a perspective detail of the drill driving member.

In the particular form of our invention as shown in this drawing, the holder has a main body Ill which is preferably tapered in the usual manner and provided with a tang II at one end and an annular bead or projection I2 adjacent to the other end. 'Ihe body portion is hollow or has a cylindrical hole therein provided with screw threads I3 for engagement with threads or teeth Ill on a cylindrical adjusting and driving member I5 as shown in Figure 8. The driving member I5 has a slot or recess I6 in its outer end, the sides of which are preferably tapered or beveled to provide for engagement with tanga of different sized drills.

The driving member I5 is slidably mounted in a sleeve I'I which fits closely within the cylindrical opening in the body and which has a longitudinal slot I8 through which the teeth I4 or toothed projection on the side of the driving member I5 project. The driving member I5 is held in the sleeve I1 by means of a plug I9 which fits in one end of the sleeve and is secured by a pin 20. lThe sleeve I1 has an annular enlargement or projection 2| at its outer end which fits within a recess 22 in the end of the body II) and these parts are held in assembled relation by means of a spring ring 23 which fits in grooves 24 and 25 in the sleeve and body respectively as shown in Figures 4 and 6. Any suitable connection may be provided for holding the parts against longitudinal movement while permitting rotative engagement but the ring 23 is preferably of circular cross section so that the parts may be readily assembled but will require considerable force in order to pull them apart.

'Ihe sleeve II also has another enlargement or annular projection 26 which is shouldered to fit against the end of the body I0 and which has longitudinal teeth 21 which correspond with or are substantially the same as teeth 28 on the outer surface of the body I0 at its adjacent end.'

These teeth coact with teeth 29 in a driving collar 3U which is slidably mounted on the cylindrical end portion 3| of the body and on the enlarged portion of the sleeve Il and serves for inter-engaging or causing these members to be xed together, or to permit rotation of one with respect to the other. It will be seen that the teeth 29 only extend part way along the collar 3D so that when the collar` is shoved inwardly against the ring or projection I2 as shown in Figure 3, the teeth 29 will engage both sets of teeth 21 and 28' so that the sleeve will be driven with the body member. However when the collar 30 is moved outwardly as shown in Figure 4, the teeth 28 will be disengaged so that the collar may be used for turning th-e sleeve I'I and the collar is preferably knurled as shown at 32 for convenience in turning the same.

The sleeve I'I is provided on its extreme outer end with any suitable arrangement for engagement with a drill 33. For this purpose the end of the sleeve may be provided with jaws or collet clamping means 34 which are tapered to coact with a clamping nut 35 that engages with threads 36 on the sleeve Il. This provides a more or less common method of clamping or driving member l5 whereby the drill will bev driven by such member. Our improved holders -may be made for one size drill only or may be made adjustable for holding various sizes.

When the parts have been assembled as shown and the drill is to be adjusted, the collar 3B which has a yielding or spring fit, is moved. longitudinally of the body or housing l until it is` free to turn and the collar serves to turn the sleeve il' which causes the teeth i4 of the driver l5j to turn in the threaded bore of the body and consequently cause the driver I5 toy move longitudinally of the body and thereby adjust the drill to the desiredy position. When the drill has been adjusted the collar 30 is slippedback to its driving position so` that when the body l0 is turned the drill will be driven positively through the medium of the sleeve il and driving member Iii. After the drill or tool has become worn and further adjustment is required it may be performed by repeating these steps or operations as will be readily apparent to those familiar with such devices.

It willbe noted that this provides an accu-rate or delicate adjustment kwhich depends in part upon the pitch of the screw threads, and: the amount of adjustment may be noted or meas# ured by means of micrometer scale 38 on the collar 3D which coacts with an index or point 39 on the projection l2. We have showni'and described a preferred ccmmercial Aembodiment of our invention but wek have also utilized the same with different forms of end chucks or colletsand other modifications employed which readily come within the scope of the invention and` therefore we do not wish tohave the same limited to the particular form shown and described except as specied in the. following claims, in which we claim.

l. An adjustable tool holder comprising a body portion having a threaded bore, a sleeve rotatably mounted on the bore, meansy for holding the sleeve against longitudinal movement relatively to the body portion, a driving member slidably mounted in the sleeve and having a threaded: projection extending outwardly through a longi-` tudinal slot in the Asleeve and engaging with said threads, means on the driverfor' positively engaging the tool to be driven for driving the tool, chucking` means at the outer end of the sleeve for engagement with the tool, and adjustable means for lockingthesleeve in rota-tive en\` gagement with the body portion or releasing thel same to permit turning ofthe sleeve for adjusting the tool. 1

2. An adjustable feed drill chuck having a bore with threads therein, a sleeve fitting closely within the bore and having a longitudinal slot, a driving member slidablymounted inv the sleeve and having a longitudinal projection extending outwardly through the slot and provided with teeth for engagement with said threads, means for holding the driving member in the sleeve, said driving member being provided with means for positively engaging the drill to bev driven,

means for holding the sleeve in the chuck, means at the outer end of the sleeve for engagement with the drill for holding the same in the sleeve,

bore and having a longitudinal slot, a slide in the tube having a toothed projection extending outwardlyv through the slot and engagingr with said Y threads, saidslide having a recess in one end for receiving the end of a tool for turning the same, a spring ring engaging with the chuck and tube for holding the tube in the bore, said tube having an annular projection engaging with the end of the chuck, lradially arranged teeth on the end of the chuck. and on said projection, a collar having teeth engaging with the teeth on the projection and adapted to engage at times with the teeth on the chuck when, the collaris moved to driving position and to be free from the teeth on the chuckwhen the collar is` moved to position for rotatingnthe tube, and a collet on the end of the tube for engagement with the tool to be driven.

4. In a tool holder, the combination of a body portion for engagement with a drilling machine or the like for turning the same, said body portion having a threaded bore extending inwardly from one end and having peripheral teeth at. the outer end, a sleeve fitting within the threaded bore, a longitudinally adjustable driver coacting with the sleeve and the threads and adapted for driving a tool, means for holding the sleeve in rotative engagement with the body` portion, an annular` projection on the sleeve engaging with the end ofthe body portion and having teeth adapted to match the teeth in the end of the body portion, an adjusting collar yieldingly engaging with the end of the body portion, an annular projection on the body portion for limiting the movement v ofthe collar in one direction, saidY collar having teeth engaging with the teeth on said projection when in adjusting position and adapted to engage withjthe teeth on the body portion also when in driving position, and means for detachably holding a tool in the sleeve.

5. In a device of the character set forth, the

combination of a cylindrical socket, a tool receiving and holding member slidably and rotatably mounted in the socket, means for holding a tool in said member for driving the same, adjustable means coacting with the socket and said member for turningsaid member when in one position and for locking the member to the socket when in another position whereby said member may be driven by the socket, a tool adjusting member slidably and non-rotatably mounted in the tool supporting member, and means for operatively connecting the tool adjusting member with the socket whereby said memberwill be adjusted longitudinally when the tool holding member is turned with respect to the socket and will be held in adjusted position xed to the socket.

BENJAMIN F. ROSENBERG. JAMES A. SCULLY.

when said member is 

